JSFiddle - React, Tailwind, and code Playground

by Tarek Faham

HTML

<form id="form1" runat="server">
        <input type='file' id="imgInp" />
        <img width="100px" hright="100px" id="blah" src="#" alt="your image" />
    </form>

JavaScript

function readURL(input) {
        if (input.files && input.files[0]) {
            console.log('If started');
            var reader = new FileReader();
            
            reader.onload = function (e) {
            		console.log('reader.onload() started.');
                console.log("target.result = " + e.target.result);
                $('#blah').attr('src', e.target.result);
            		console.log('reader.onload() completed.')
						};
            console.log('def reader.onload() done.');
            
            console.log('reader.readAsDataURL started.')
            reader.readAsDataURL(input.files[0]);
            console.log('reader.readAsDataURL completed.')
					}
    }
    
    $("#imgInp").change(function(){
        console.log('change event started.')
        readURL(this);
        console.log('change event completed.');
    });